| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.server.datanode; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| |
| /** |
| * |
| * This is the JMX management interface for data node information |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public interface DataNodeMXBean { |
| |
| /** |
| * Gets the version of Hadoop. |
| * |
| * @return the version of Hadoop |
| */ |
| public String getVersion(); |
| |
| /** |
| * Gets the rpc port. |
| * |
| * @return the rpc port |
| */ |
| public String getRpcPort(); |
| |
| /** |
| * Gets the http port. |
| * |
| * @return the http port |
| */ |
| public String getHttpPort(); |
| |
| /** |
| * Gets the namenode IP addresses |
| * |
| * @return the namenode IP addresses that the datanode is talking to |
| */ |
| public String getNamenodeAddresses(); |
| |
| /** |
| * Gets the information of each volume on the Datanode. Please |
| * see the implementation for the format of returned information. |
| * |
| * @return the volume info |
| */ |
| public String getVolumeInfo(); |
| |
| /** |
| * Gets the cluster id. |
| * |
| * @return the cluster id |
| */ |
| public String getClusterId(); |
| |
| /** |
| * Returns an estimate of the number of Datanode threads |
| * actively transferring blocks. |
| */ |
| public int getXceiverCount(); |
| } |